Awarding bases on obstruction

[silkseller]

We had this topic come up last night at our preseason rules clinic. Fast pitch girls NFHS rules, please.

Play: There is a rundown between bases, and the runner contacts the fielder as she is running back to let's say first base (I'll include other bases later). Umpire calls obstruction. Here's where the dissagreement began. Some said only award back to base in which she was returning to; in this case First Base. Others said, to award her second base. The rule is on page 65 of the new Softball Rule book, but it is not totally clear.

Later in the meeting, it came up where the obstruction was at third base, and almost all said to award home and thus a run.

Is there a definitive answer? We need some help clearing this up.

Thanks to all in advance for their responses.